TABLE 3.
Response to clindamycin of major PCR ribotypes of C. difficile comprising ≥5 isolates eachc
| PCR ribotypea | Presumed serogroupa | n | Proportion (%) classified
|
||
|---|---|---|---|---|---|
| Susceptible | Intermediateb | Resistant | |||
| SE3 | D | 10 | 10 | 30 | 60 |
| SE12 | A2 | 5 | 0 | 100 | 0 |
| SE14 | 5 | 0 | 80 | 20 | |
| SE16 | A | 8 | 0 | 100 | 0 |
| SE17 | 5 | 0 | 40 | 60 | |
| SE19 | 8 | 12.5 | 88.5 | 0 | |
| SE20 | G | 14 | 7.1 | 71.9 | 21 |
| SE21 | H | 35 | 14 | 86 | 0 |
| SE21b | A8 | 22 | 14 | 81.5 | 4.5 |
| SE22 | 13 | 15 | 85 | 0 | |
| SE29b | 8 | 25 | 50 | 25 | |
| SE25 | 7 | 57 | 43 | 0 | |
| SE30 | 5 | 0 | 100 | 0 | |
a
See reference 25.
b
This group is also defined as resistant by the SRGA.
c
The definitions used in this context were susceptible (MIC ≤ 2.0 mg/liter), intermediate (>2.0 to 256 mg/liter), and resistant (MIC > 256 mg/liter). The three isolates resistant to fusidic acid belonged to different ribotypes (see text).